[Qt-interest] A shared singleton and Q_EXPORT_PLUGIN2

[Ben Martin]

Hi,
   While tinkering with Soprano I found an issue where it is using a
Q_GLOBAL_STATIC from both its main library and inside a plugin that it
loads to handle serialization. It seems that when declaring a method
containing a static variable (to try to create a singleton) the address
of the static variable will be different inside a Q_EXPORT_PLUGIN2 than
outside it.

  Has anyone got any pointers on creating shared singletons that are
robust across a Q_EXPORT_PLUGIN2 boundary?

Thanks.
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